Cooling arrangement for internal combustion engines



Fig. 3.

Q-aa as W. SEYERLE /as if Original Filed May 14, 1936 COOLING ARRANGEMENT FOR INTERNAL-COMBUSTION ENGINES Aug. 7, 1945..

Patented Aug. 7, 1945 OOULNG ABBANGEMENT F03 INTERNAL- COMBUSTION ENGINES wilhelm seyerle. Wanssum neun.

on-the-Neckar, Germany; vested in the Alien Property 'cm t Original application Hay 14, 1936, S No.

19,884. Divided and this application 'Fe h Serial No. 189.394. In

5 ilaimn. (m. 12S-171i This invention relates to a cooling arrange- View illustrating a modiiled iorm of cooling pesment for internal combustion engines and more sage: and

particularly, is directed to an improved construe` Fig. 11 is a' cross-sectional view showing a tion for cooling the cylinders of an internal commodiiled iorm of cooling rim.

bastion engine. This application is a division of 5 Fig. 12 ls a longitudinal section through an en'.- my oo-pepding application Serial No. 79,684, iiled gine cylinder similar to Fig. 5 but with an addi- M'ay 14, 1936. tional conduit arranged t0 convey cooling fluid An object of this invention is the provision ci directly to the upper D0rtion of the cylinder liner. an improved and eillcient arrangement for the In the preferred form of my invention as porcoolingoianinternal combustion engine. iotrayed in-Figs. l and 2. the cylinder casing 32 of Another object of thisinvention -is the provian internal combustion engine is preferably prosion of improved cooling means for and in lntivided withl a collecting space 33 to which a coolmate contact with Athe cylinders of an internal ing medium, for example, water, air, oil, or any combustion engine. other suitable iluid, is adapted to be supplied.

Still mother object oi' this invention is the 15 Inside of the collecting space 33 there may be po-T cooling oi the cylinders of an internal combussitioned a plurality or ribs 34 secured in place by a tion engine by passing a cooling medium lcngiweb 3i preferably cylindrically shaped, which is tudinally along and in. close heat relationship supported in -the cylinder by ledges or bridge withthe cylinder walls. l members 36. The ribs 34 are located compara- A further and more speciilc object of this in- 2o tively close to one another and extend either parvention is the provision of an improved construcallel to the axis of the cylinder or they may form tion for cooling the walls of an engine cylinder a steep helical line extending along the liner il. wherein the cooling uid moves transversely The liner 3l may be made either in one casting about said cylinder at the hottest part thereof with the casing or manufactured .as a separate and then nows lmgitudinally along the cylinder 25 member and later ilrmly, attached to the casing walls. Generally speaking, this invention may as by The liner 3l together with the be defined as comprising the constructions and cylindrical member 39 and its ribs 34 form a plucombinations recited in the annexed claims and rality of passages 38 communicating with the colillustrated in certain embodiments in the draw lectl'ng space 33 through lower apertures is. An ing accompanying and forming a partoithis ap- 30 upper collecting space l0 constitutes a continua;- plication wherein: tion of the passages 38 and leads the cooling agent Fig. 1 is a longitudinal cross-sectional view of through passages 4l into the cylinder head d2. an engine cylinder illustrating a preferred ema As clearly illustrated in Fig. 9 the ends oi the 'bodilnent 0f my cylinder c001in8 wntrllctinn; es Il may be denned in the form of e. nos- Flg. 2 is a transverse crS-Selll View along 35 zle and enclose a central opening 43 as a the line II-II ofFls- 1;. space. for an inlet valve. In accordance with the Fig. 3 is a longitudinal cross-sectional view ci above construction; the cooling udis adapted te an engine cylinder showing another form or my nrst flow into the collecting space 38 through a construction.;- suitable channel (not shown). From the col- F18. 'i is a' transverse cross-sectional View nl0n8 40 lecting space 33 'it ilows through the apertures 3s the line IV-IV of Fis. 3: and upward through the passages 38 into the an- Flg. 5 is a longitudinal cross-sectional View oi .nular channel 40. From the channel 40 the coolan engine cylinder illustrating a third mansoing mediumthen ilows out through the passages ment according tomy invention: Il in the cylinder head.

F18- 3 1S met ctw-munl'view 310118 46 The modled form of construction illustrated thelineVI-VIofFi8-5: s inFlgs.3and4diiiersfromthatshowninFig.l

FII. 7 1S lnitudlnl mectionl View 0f Y and 2 only in the fact that here the collars which an engine cylinder illustrating a fourth form of hold the liner in place as in Figs. land 2, are enmy improved cooling arrangement; larged to iorm a surrounding cylindrical wall 46,

F18- 8 i8 n tl'nlvel'e ONSS-M0031 View' 810118 50 thus preventing direct contact 'of the cooling fluid thelineVIlI--VIlIofFlg.7; with the liner. In accordance with the termi- Plg. 9 is a transverse cross-sectional view nology oi this artthe form ci the invention illusthroughthecylinder headaccordingtomy inventrated rn I llgs. l and 2 may be termed the wet tion; liner construction, while that in Figs. 3 -and 4 is Fig. l0 is a partial transverse cross-sectional 55 Athe dryliner construction. The 'rest-of the arrangement in Figs. 3 and 4 is identied with that showninFigs. 1 and2.

In the third form oi' my invention illustrated in Figs. 5 and 6, a plurality of transverse ribs l5 are provided in addition to the longitudinal ribs 34. These transverse ribs are preferably positioned above the longitudinal ribs between the latter and the cylinder head. The ribs 45 form cooling passages 48 surrounding the cylinder liner at its hottest portion and have a damming eiiect at the inlet side 41 and a diffusion eiiect at their exit side 4l. A mass of material 49 in the shape of an eddy core isiplaced in the cooling passage Il on the exit side to prevent turbulence of the streaming cooling agent, and thereby increasing the efficiency and effect of the cooling fluid. This construction is more fully explained in my said co-pending application Serial No. '79,684 illed May will then flow smoothly and in intimate contact 'with this mass oi' material and no eddy currents will be produced.

Another feature of my modied construction as illustrated in Figs. 5 and 6 is that a portion or the collecting space may be subdivided into a -plurality of cooling passages il by means o! ribs 5I', thereby increasing the contact surface between the cooling fluid and the cylinder parts.

As clearly shown in Fig. 5 the upper annular channel ll inthis form of the invention communicates with a hollow space l2 positioned in front of the ribs Il, whereas the cooling passagesj 4| through the cylinder head communicatewith the passages Il formed by the ribs Il. Therefore, the cooling agent contained in the collect- .ing space 33 ows, on the one hand, through the cooling es Il and out through the passages Il, while on the other hand, it flows from the collecting space 33 through the aperture 39, the cooling passages 3l, the channel Il, the hollow space I2 and out through the transverse passages II formed by the ribs Il. If desired, at the upper end ot the longitudinal es Il. an opening 53 can be provided in the wall 3l so that the pressure of the cooling iiuid can be equalized at thispoint. Thiscaiening il can alsobeused to supply cooling iluid which has not been preheated by the ribs Il by connecting this opening to a separate pipe or conductor.

The space adjacent the upper portion of the cylinder liner 31 is directly cooled by the arrangement ahown in Fig. 12, wherein the conduit -aconnectstliestreamotfreehcoolingiiuid with the opening Il adjacent the'top of the cylinder liner.

The fourth constructional form of my 'inventionillustratedinl'igalandissubstaniially The amount of surface in contact with cooling iluid can also be increased by forming thecooling ribs Il with undulated surfaces or with grooves and protuberances as shown in Fig. 11.

It will thus be seen that I have provided a construction which satisiles thev object s enumerated above, and while I have shown the invention in certain physical embodiments, it is to be understood that modifications of the -structure shownl maybemadebythoseskilledinthisartwitho'ut departing from my invention as expressed in the following claims.

I claim:

1. In an internal combustion engine, a cylinder adapted to be cooled by a iiuid, a Jacket surrounding the cylinder i'or guiding said iiuid along it, a cover located upon the cylinder and being likewise oooledbyauldandtakingpartinguiding the same at the cylinder, a system of cooling channels provided in the cylinder Jacket and in the cylinder cover and being closed on all sides. and accumulations of material in the cylinder jacket and the cover for presenting the lowest possible resistance to the iiow pf the cooling agent and to the heat to be abstracted, said accumulations being subdivided in the directions oi' now of the cooling agent and presenting large surfaces in the subdivided portion, a storage receptacle for the said cooling fluid and longitudinal ribs and transverse ribs grouped. around the cylinder, and

an intermediatefmem'ber separating the longitudinal ribs from said storage receptacle, vthe iongitudinal cooling channels formed between the longitudinal ribs communicating with the transverse cooling channels of the cylinder and with the cooling channels of-the cover, and a lower annular channel establkhing a .connection betweenthe saidstoragereceptacleandthechannels located betweenthe longitudinal ribs and an upper annular channel 'establishing a connection between the longitudinal channels and the channels in the cylinder cover.

2.Inanintemaicombustlon enginehavinga cylinder, a cylinder liner surrounding the main combustion space, a transverse passage about the -topotthelinerinheateommimicatingrelatim ship therewith, a plurality of passages extending substantially parallel to and in heat communicating lrelationship with said liner and communicating at one end with said transverse pesage',

vmeansforpassingacoolingmedimnthroughall thermaleillciencyci'saidpassage.

thesameasthatslmowninlilgs.landiiexcept for the fact thataseparating walluisprovided -3. Inaninternal combusionenginehavinga cylinder, a cylinder liner surrounding the main combustion space. a transverse passage 'about the top of the liner in heat communicating relationship therewith, a plurality of passagesextending substantially parallel to and in heat communicating relationship with said liner and communicating at one end with said transverse passage. means ior a cooling medium through all of said es, a storage space in said cylinder for said cooling medium. a cylinder head having a nome-like cooling passage therethrough," conduits connecting said storage space with the passages extending substantially parallel to the liner, and further nozzle-shaped passages connecting said storage space with the passage in said cylinder head.

4. In an internal combustion engine, a cylinder adapted to be cooled by a streaming cooling fluid, a first jacket spaced :from and surrounding said cylinder, longitudinal ribs between said jacket and the cylinder forming longitudinal canals for the streaming cooling luid therebetween, a second jacket spaced from and surrounding rst jacket to form a collecting space for the cooling uid there-between, said first jacket being formed 'with an opening communicating with said collecting space to permit ow of the cooling fluid therefrom into said longitudinal canals, and a cover resting upon the cylinder, provided with a valve opening therethrough and having a plurality of and extending at substantially right angles to said longitudinal canals` said ribs being positioned between the annular cooling fluid collect ing space and the bottom of said cylinder cover, whereby the cooling uid flowing from the longitudinal canals will divide between the cover canals and the transverse canals about the cylinder.

5. In an internal combustion engine, a cylinder adapted to be cooled by streaming cooling uid, a rst jacket spaced from and surrounding said cylinder, longitudinal ribs between said jacket and said cylinder forming longitudinal canalsfor the Streaming fluid therebetween, a second jacket spaced from and surrounding said first jacket to form a collecting space for the cooling fluid therebetween, said first jacket being formed with an opening communicatingwith said cooling space to permit the flow of the cooling fluid therefrom to said longitudinal canals, and a plurality of transverse ribs extending about the cylinders near the top thereof and forming with said first jacket a plurality of transverse canals communicating with said longitudinal canals.

WILHELM SEYERLE. 

